The above image is of a jucá (Calsalpinia ferrea) seedling that may be 12 inches high. I thought the contrast between the newer and older leaves was of note, as well as the format of the branches. The parent of the seedling is only 20 meters away, a tree that may be 60-70 years old. I'm told that word "jucá" in the indigenous language means "the wood that kills", referring to it's high density. Evidently, the wood is used to make war clubs.